http://www.gameinformer.com/b/news/archive/2015/08/04/destinys-year-one-legendary-weapons-staying-behind-in-year-two-9432.aspx
Sorry, but this is a HUGE mistake. I grinded my ass off for my weapons and now I've got to leave them behind? Sorry but that's bullshit Bungie. What's an even bigger crock of shit, is that PvP will still get to use the old gear effectively while us pve get bent over and -blam!-ed.
EDIT: https://www.reddit.com/r/DestinyTheGame/comments/3frkbk/game_informer_ttk_info_dump_megathread/ctr9rl1
There may still be hope!